Outlook Desktop Not Syncing
I'm having an ongoing issue with Outlook Desktop that I can't seem to solve. It stops syncing after it initially loads. I have 8 inboxes (there have been this many for a couple years) and they all sync when I open Outlook but then stop after the first time they sync. Microsoft support was also unable to help. They believed they had it fixed but it stopped working again. Before I try with them again I thought I'd ask about it here.
Things I've tried/things to note:
-I have uninstalled and re-installed all Microsoft 365 apps (including Outlook obviously)
-I have tried a new Outlook profile
-I have added accounts back one at a time
-I have changed the Outlook file registry path to force it to make a new one (Microsoft Support attempt)
-There is an Outlook icon in the system tray that says "Microsoft Outlook is synchronizing folders" when I hover over it. I think this is causing the issue.
-I am using classic Outlook, not the new version. The new one seems to be working fine. The inboxes are updating just fine online
-In the bottom right of Outlook it says "Connected to: Microsoft Exchange" so no indication it's having connection issues.
Something is hanging up the sync and I have no clue what it is. I've spent hours on this now trying to research the problem and implement potential fixes.
Hoping someone can help!